Convertible case and display-stand for charts



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UNrrnDl STATES-z PATENT NELSON IV. MACKEY, OF CHICAGO, ILLINOIS.

CONVERTIBLE CASE'AND DISPLAY-STAND FOR CHARTS.

SPECIFICATION forming part of Letters Patent No. 511,089, dated December 19, 1893.

Application led April 6, 1893, Serial No. 489,36. (No model.)

To @ZZ whom t may concern:

.I Se Ait known that l, NELSON W. MACKEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illiners, have invented a new and useful Improvementin Convertible Cases and Display- Stands for Charts, of which the following is a specification.

My object is to. provide a convertible case particularly for SchoOLchartS, which in its g closed 'condition will serve as a housing for the charts to protect them from the dust and render the device readily portable, and which in its opened condition will afford a stand for conveniently displaying the charts.

In the drawings-Figure l isaperspectve view of my improved device opened to afford the display stand; one corner being b rolien away to show construction; Fig. 2, a similar view of the same, showing the device closed; Fig. 3,a broken vertical section, enlarged, of the upper part of the device when opened, illustrating the manner of its use as a display stand; and Fig. e, an enlarged broken'sectional view, showing a detail of the construction.

A is a casing comprising the front t, back t', side strips t2 and base strip t3 secured together to afford abox open at its upper ed ge.

B is a frame preferably in the form of a tray having a solid back s, side strips s s', bottom strip s2, and top strip s3. The tray B slides in the casing through the open end of the latter, and the side strips t2 are cut away at their upper ends to permit the top strip S3 y of the tray, when closed in the casing, to extend iiush with the top edges of the front t, and back t. On the side strips s', toward their lower ends, are spring catchesr adapted to engage sockets fr in the upper end portions of the side strips t2 and hold the trayin its elevated position. On the back of the casing is a folding leg or leg frame q, which is preferably hinged in place, as shown, whereby it may be closed against the baci; 15 when not in use. On the casing is a hook over the top rail s3 to bring the different charts into view. To prevent the charts from becoming caught and wrinkled as the tray is slid into the casing, I provide a stifrernov able, preferably card-board sheet D of about .black-board surface, and with a small opening m at the top at which it may be passed over the hook p, as shown in Fig. 3,when the device is used as a display stand.

My improvement is more especially designed for use in school rooms, and the blackboard D, when hung upon the hook p, is in convenient position for use by the teacher While explaining problems or other matter contained in the charts.

The case when closed affords an effective means for keeping the charts. clean and in good order when not in use; and as it may be quickly and'readily converted into a convenient display stand for the charts, it alords a particularly desirable device for the purposes for which it is intended.

Although I prefer to construct the device as shown and described, it may be modified in the matter of details of construction Without departing from the spirit of my invention as defined by the claims.

What I claim as new, and dsire to secure by Letters Patent, is-

1. A convertible case and display stand for charts, comprising, in combinatioma casing A, adapted to stand upon end,a frame to which the charts are attached fitting inside the casing and adapted to slide in and out at the upper end thereof, and operating when partly withdrawn from the casing to hold the charts in position for display, and stop mechanisin on the device for sustaining the frame in elevated position, substantially as described.

2. A convertible case and display stand for charts, comprising, in combination, a casing A, provided With a folding leg, q,whereby the casing is adapted to stand upon end, a frame vto which the charts are attached fitting inside the casing and adapted to slidein and out at the upper end thereof, and operating IOS yLe

the device for sustaining the trarne in its ele- Vated position, a series of charts attached at their upper edges to the upper end portion of the frame, whereby they may be thrown over the top of the fra-me, and a blackboard D fitting the frame and operating as a. guard for the charts to hold them flat while the frame is being slid into the casing, substantially as described.

NELSON V. MACKEY.

In presence of M. J. FROST, W. N. WILLIAMS. 

